Work-holder for machines.



B. L. SCHMIDT.

WORK HOLDER FOR MACHINES. APPLICATION FILED JULY 19 191 7- l,265,818., IPatented May 14, 1918.

'wi zzessey BERNHAED L. SCHMIDT, OF DAVENPORT, IOWA.

WORK-HOLDER roe MACHINES.

Specification of Letters Patent.

Patented May is, 1918.

Application filed July 19, 1917. Serial No. 181,548.

To all whom it may concern.

Be it known that I, BERNHARD L. SCHMiDT, a citizen ofthe United Statesof America, and a resident of Davenport, county of Scott, State of Iowa,have invented certain new and useful Improve ments in Work-Holders forMachines, of which the following is a full and clear speciiication.

This invention relates to improvements in grinding machines and moreparticularly to work-holders or angle plates therefor.

An object of this invention is to provide suitable means which mayreadily be attached to a grinding machine for holding the work.

Another object is to provide adjustable means for holding the work on agrinding machine.

Other objects will appear as the description proceeds.

In the accompanying drawings which constitute a part of my specificationFigure l is a perspective view of my improved work-holder detached;

Fig. 2 is an end view of the same; and

Fig. 3 is a perspective View of the jawadjustment link.

In carrying out my invention, I employ any ordinary type of grindingmachine frame, as, for instance, that which is illustrated in myapplication for grinding chine, filed on this same day and numbered181,541

I provide substantially right-angular shaped frames or members 1 havingclovetail slots 2 formed in their lower faces, thereby adapting them tobe readily moved from side to side in the usual manner across themachine frame. A front connecting bar 3 joins the two end members 1 andholds them in spaced relation with respect to each other.

The face of the angle frame is offset, thereby forming the seat 4. Alower member or jaw 5 is positioned on said seat t and is provided withscrew-threaded holes in its opposite ends. Another bar-j aw is providedand seats against the offset portion of the angle frame 1 and has lugs 7formed thereon which extend rearwardly and at right angles thereto.These lugs T are each provided with a vertical hole to receive adjustingscrews 8 which enter screw-threaded openings in the top of the angularframes 1.

Two fiatlinks or members 9 are provided and each has two holes 10 nearone of its ends and a vertical slot 11 at its other end. The links ormembers 9 are attached to the ends of the two jaws 5 and 3 by suitablebolts 8 to adapt the jaw-bars to be relatively adjusted vertically asmay be needed to receive and hold cylinders cast en 6200, or singlecylinders of different sizes, or other work.

t will be seen that the jaws 5 and 3 may be easily adjusted relativelyto hold differ ent sizes of cylinders and may also be bodily adjustedtransversely as well as vertically of the machine frame, so that allparts of the interior of the cylinder or cylinders may readily bereached for grinding.

It will be understood that minor changes in detail of construction maybe resorted to without departing from the spirit of the invention. v I

The nature and scope of the invention having been thus indicated and itspreferred embodiment having been specifically described, what is claimedas new is:

l. The combination with a machine, of a work-holder therefor comprisinga frame adapted for adjustment on the frame across the path of the tool,a pair of parallel jawbars and means for adjustably connecting themtogether, and means for adjustably hanging the upper one of saidjaw-bars to said frame, so that both bars may be adjusted verticallytogether, for the purpose set forth.

2. The combination with a machine, of a work-holder therefor comprisinga frame adapted for adjustment on the frame across the path of the tool,a pair of parallel jawbars and means for adjustably connecting themtogether, said means for adjustably connectingsaid jaw-bars togetherconsisting of bars rigidly attached to the uper bar and adjustablyconnected to the lower bar, and means for adjustably attaching the upperone of said j aw-bars to said frame, for the purpose set forth. I 1

3. The combination with a machine, of a work-holder therefor comprisinga frame adapted for adjustment on the frame across the path of the tool,a pair of parallel jawbars and means for adjustably connecting themtogether, and means for adjustably hanging the upper one of saidjaw-bars to said frame consisting of a screw swiveled into the upperjawbar and tapped into the transversely movaole frame, whercoy both haitogether may he vertically acljustetl,

for the purpose set forth.

T he combination with machine, of a worleholclei" therefor compile K"train adapted for adjustment on the flame across the path of the tool,a pair of parallel jawhai's and means for aojustahly connecting themtogether, atot means for acljustahly attaching the upper one of saidjaw-baits to said frame, whereby both hays may he T'Elt-l- Callyadjusted together, said jaw-bars both having their encls sliclingl qresting against the front face of said frame.

The combination with a Work-holder therefor consisting 0 adapted foradjustment on the frame fle eies of agetent may he ohteiae x01 the pathof the tool, said frame consisting o cross-her. a pair oi end ugiightsand a to of parallel bar exteaetihg from one upright D81 hm, and meansI01 acljustably hanging L the aforesaid top cross bar, wliei'ehv bothbars may he Vertically together in sliding relation with edges of theuprights.

{no-11y whereof I hereunto atlix my lhe uphei' bill upon SCHMIDT.

*fiommissioner of Patents,

